Which punctuation mark is required to set apart an introductory phrase?

Consider the music used in the scene where scout meets boo radley for the first time, and answer each of the following questions in about two to three sentences. how would you describe the tone of the music while boo is hiding behind the door? compare that to the tone of the music when he is brought into the light and scout smiles at him. how does the music change? what effect does that change have on the way the viewer perceives the character of boo radley?

(important to read ender's game before answering) in what ways can people be both intelligent and foolish at the same time? how does the author show ender’s intelligence enabling him to fight against authority? make sure your ideas are well-organized and clear. review your word choice and make sure supports your purpose. edit by correcting errors in spelling and grammar and give your work a final polish.

How is the word laud and welcome different